Reversing-valve for regenerative furnaces, &amp;c.



@EME-'D MAR. 8, 1904- Ci G. ATH. LVB FOR REGENE FURYACES, ne.

RATVE REVERSING VA APPLICATION FILED OCT. l0,

3 SHEETS-SHEET l.

H0 MODEL.

f m w m ma wrom/5W PATENTED MAR. 8, 1904.

C. G. ATHA. REVERSING VALVE FOR REGENBRATIVE FURNACES, ne.

APPLICATION FILED 00T.10, 1903.

a SHEETS-SHEET 2.

H0 MODEL.

n I l l I n I y l i l l l l l No. 754,272. PATENTED MAR. 8, 1904.

C. G; ATHA. RBVERSING VALVE FOR RBGENERATVB PRNAGES, zoi

APPLIGATION FILED OOT.10, 1903.

3 SHEETS-SHEET 3.

mum @M5 am@ UNITED STATES 4 Patented March 8, 19,04.

PATENT OFFICE.

CHARLES G. ATHA, OF PARTICK, SCOTLAND, ASSIGNOR OF ONE-HALF TO WILLIAM BEARDMORE AND COMPANY, LIMITED, GLASGOW- COUNTY, SCOTLAND.

REVERSING-VALVE FOR REGENERATIVE FURNACES, 81.0.

SPECIFICATION forming part of `Letters Patent No. 754,272, dated March`8, 1904.

Application filed October 10 1903.

To all whom, it may concern:

Be it known that I, CHARLES GURNEY ATHA, a citizen of the United States of America, and a resident of Partick, in the county of Renfrew, Scotland, (whose postal address is Manhanset, Bishops Road, Partick, Scotland) have invented certain new and useful Improvements inl and Connected with Reversing- Valves for Regenerative Furnaces and the Like, (for which application for a British patent has been made, No. 6,004, dated March 16, 1903,) of which the following is a specification.

The said invention relates to what are known as water-sealed reversing-valves f or regenerative furnaces and otherfurnaces in connection with which it is necessary to be able to reverse the direction of iiow of the gas or gas and air when desired; and the invention has for its object to improve and simplify the. construction and operation of the carrying and operating mechanism of such valves so that they will be reliable and satisfactory in use.

The invention is illustrated by the accompanying drawings, which will be referred to in the course of the description, the same reference-letters being used throughout the said drawings to mark the same or like parts Wherever they are repeated.

Figures l and 2 of the drawings are respectively a longitudinal and a transverse section of my improved reversing-valve arrangement. Figs. 3 and 4 are respectively a side elevation and an end elevation of mechanism employed in connection with the Working of the reversing-Valve.

In carrying out the invention there is provided the usual bed-plate A, having an upwardly-projecting rim A round it of a height suilicient to hold the desired depth of water B to form a seal for the valve, end extensions B being attached to the bed-plate on each side to allow for the working of certain link parts to be hereinafter described. This troughshaped bed-plate A is formed with'three 'ports A2 A3 A4, suitably spaced from each other and having their top edges projecting a little above the level of the water seal B. The parts Serial No. 176,521. (No model.)

A2 A:4 A4 are arranged as ordinarily, the center one, A2, being the discharge-port leading A4, which are on each side of the dischargeport, are those through which the gas passes alternately to the furnace. A brick-lined inlet-casing C is fitted, by means of side fixingbrackets C, tothe bed-plate A and is arranged to extend over the ports, its sides being kept some distance clear of the sides of the bedplate, while its lower edges dip down into the water seal B. The gas or air inlet C2 is formed on the casing C, and doors C3 C4 are arranged on its ends for the purpose of obtaining access to the interior. controlling the passage of the gas, as described, is a plate or hood D, of metal or other suitable material, somewhat arch-shaped and formed so as to cover the central port A8 and one side port, as A4, at one time, as shown in Fig. l. According to the invention the valve D is carried on an angle-iron frame D', fitted with two cross-axles D2 D3, furnished with Wheels D4, arranged to run on rails E, formed on or iixed to the floor of the bed-plate A along each side of the ports A2 A3 A4, or the axles D2 D3 may be attached directly to the valve-hood D. When the valve D, as shown in Fig, l, is covering the ports A3 A4, its lower edge dips all round into the water seal B, and thus prevents the possibility of leakage of the gas. The rails E are arranged with raised portions E at suitable points so as to lift the valve clear of the edges of the ports A2 A4 when it is being shifted from one position to the other'.v

The gear for operating the valve D is shown The valve for in Figs. 3 and 4: and is composed and arranged as follows: The front axle D2 is connected by the saidl lever three similar pulleys L L2 L3 5o to the chimney, While the other two ports, A2

are mounted on brackets LAi L5, fixed to a crossbeam L. A rope K2 is carried down from the end of the intermediate lever H2 andled round the under side of the lower pulley K and then carried up and round the upper central pulley L2, from which it is then led down and attached to a vertical rod K2,which passes down through an opening formed for it in the center of a balance-weight M, arranged to rise and fall between vertical guide parts M', ixed to a stool orA seat M2, through the top of which an opening is also made for the passage of the rod, the lower end of the said rod being fitted with an adjustable stop K4. N N2 are also attached to the end of the intermediate lever H2 and are carried up and led round the two remaining upper pulleys L L3 and attached to vertical rods N3 N2, passing down through openings formed for them in the balance-weight M and in the top M3 of the stool M2, the rods being also provided with adjustable stops N5.

When the parts are in action and in the position,for example, which is shown in the drawings, the gases enteringl through the inlet C2 to the interior of the casing C pass to the furnace through the port A2 not covered by the valve D, While at the same time the gases from the furnace pass out through the port A4 and then through the. central dischargeport A3 to the chimney. When it is desired to reverse the direction of the iow of the gas, the valve D is moved tothe other end of the casing C by working the operating-lever J, connected, as has been described, with the axle part D2 of the valve. This shifting of the valve D will thus cover the left-hand port A2 and uncover the right-hand one, A, as required. During the first part of the change movement of the valve D,-say toward the left-its wheels Dit encounter and ride up sloping parts E2, leading up to the higher level portions E of the rails E. This will lift the valve D out of the Water seal B and above the level of the ports, as required, and the raised level portions E of the rails E, as shown in Fig. l, are made long enough so that the valve will be kept in this raised position until it has almost reached its other position` when the wheels will pass down other similar sloping parts E3 to the lower level of the rails, and the valve will then be brought to the end of its travel or to its other sealing position. When the valve D is returned again to its right-hand position, the action or function of the sloping parts E2 E3 is simply reversed, the sloping part E3 now contributing to raise the valve and the part E2 tov lower it Aon nearing the end of its travel.

The weight-and-pulley gear is arranged for balancing purposes and acts as follows: The central and side rods K3 N3 N4, passing down through the balance-weight M, by reason of their special connection with the intermediate lever H2 rise and fall alternately during each to-and-fro movement of the valve D so that Two ropes while the central rod K3 is in its highest position, as shown in Fig. 3, the side rods N2 N2 are in their lowest. The weight M during its up-and-down movement always rests on either lthe central or the side adjusting-stops K2 or N5, and in the present position of the parts, as shown in Fig. l, it is resting on the stop K'1 on the central rod K3, the "distance between this stop and the stops NE on the other rods, N3 N2, being now equal to the stroke of the rods or the travel of the outer end of the intermediate lever H2. With this arrangement it follows that during the irst portion of the travel of the valveD toward the left in Fig. l-that is, when the wheels are ascending the sloping parts E2 of the rails E-the balance-weight M will fall till it rests on the top M3 of the stool M2, owing to the downward movement of the intermediate lever producing a falling movement on the central rod K". During the travel of the valve D on the raised portion E' of the rails the weight M continues to rest on the stool M2, and during the last similar sloping portion E3 of the valves travel the weight will be pulled up again to its former position by reason of it encountering the stops N5 on the other rods, N3 Nwhich are then completing the last part of their upstroke, being drawn up by the pull of their rope attachments N The movement of the balance-weight M is precisely similar when the valve D is reversed, the side rods l 3 N2 on this occasion traveling downward, while the central rod K3 is pulled up again to its former position. By

this means a most efcient balancing arrangement is thus produced, as the Weight Min falling from its highest position to the top M2 of the stool M assists the Wheeling of the valve D up the sloping parts E2 or E2 of the rails E while in rising from the stool to its former or highest position it breaks the valves movement when the valve-wheels are passing down the slopes of the rails toward the end of the valves travel. All undue strain in working the valve-operatinglever J is thus avoided and the valve can be moved from one position to the other with comparative ease and without any jarring action being set up.

If desired, the axles D2 D3, carrying the wheels D2, may be extended to the outside of the casing C and bed-plate A, being suitably cranked to pass underneath the sides of the casing and also over the rim A of the bedplate. The Wheels D4 in this case would run on rails arranged along the outside of the casing at each side, or the frame D', carrying the valve-hood D, may be made to extend underneath the ends of the casing C, so that the wheels D2 will run on rails constructed as hereinbefore described, but extending beyond each end of the casing instead of along each side of it.

What I claim as my invention is- 1. Improvements in and connected with reversing-valves, comprising, in combination, a

IOO

Watenseal hed-plate, ports therein, a stationl ary easing fitted thereto, rails formedwith l level and sloping portions, a frame having Wheels adapted to run on the rails, a revers ing-valve detaehably fixed to the 'frame and working over the ports, an operating-shaft l outside the casing, and means :for operating' the frame and `valve from such shaft, as dei scribed. i l

l l l 2. Improvements in and connected with re- 'E Y,

traveling on rails formed with level and slopversing-valves, comprising, in combination, a

trough shaped waterseal hed plate, ports formed in the oo'r thereof, a stationary easi ing; fitted thereto and having its lower edge i dipping into the seal, an inlet in the easing,

rails 'formed on the floor of' the hed-plate alongl i each side otl the ports, and having level and sloping portions, a frame ports, axles in the frame, the axles and running on the rails, taehed to the axles and norniallybelow the f level of the seal, a reversing-valve detaehably r Workingvover the i l fixed to the frame, and a shaft external to the i l l l Wheels carried on links ateasing` 'for operating" the frame and valve through the links, as described.

3. improvements in and connected with reversing-valves comprising' in combination, a l water-sealhed-plate, ports formed therein,an l

l lifted thereofll alternately inlet-easing fitted to the hedplate, a reversing-valve controlling the ports, Wheels on the valve, rails on which the wheels travel and dled operating -lever connected to thel Valve and to two sets of vertical rods fitted with adjnstahle stops, a balance-weight on the rods and a fixed stool for same, substantially as and for the purposes herein set forth.`

4. In connection with a'reversing-valve ing` parts, 'an operating-lever, two sets of' Vertical rods fitted with adjustable stops, connections between the valve and the lever and between the lever and the rods, a balance-weight on the rods, a fixed stool Afor same, the hal ance-weight restingl on the stool and heing hy each respective set ol stops, substantially as and for the purposes herein set f'orth.

ln testimony whereof' l have signed my naine to this specifica-dion inthe presence ol' two suhscrihingl witnesses.

made with level and'sloping` portions, a han- 

